Einbettungsrelationen und abgeleitete Gruppenklassen: ein Dualitätssatz.
Elementi distributivi nel reticolo dei sottogruppi d'un gruppo localmente nilpotente
Elementi neutri nel reticolo dei sottogruppi d'un gruppo
Endlichkeitsbedingungen bei Verbänden, Moduln, Gruppen.
Epimorfismi -completi tra reticoli di sottogruppi normali
Erratum to 'Rational Lie Algebras and p-Isomorphisms of Nilpotent Groups and Homotopy Types'
Existentially closed -groups
Fastabelsche Minimaxgruppen
FC-gruppi e proiettività
Some lattice properties of FC-groups and generalized FC-groups are considered in this paper.
Finitely Generated Metabelian Groups are not Subnormality Separable.
Frattini-eingebettete Normalteiler. II.
Free quotients of congruence subgroups of Bianchi groups.
Generalized Adams completion
Generalizzazioni di subnormalità e nilpotenza per gruppi infiniti
Group Rings of Hypercyclic Groups.
Groups all whose nonnormal subgroups generate a nontrivial proper subgroup.
Groups in which the bounded nilpotency of two-generator subgroups is a transitive relation.
Groups satisfying the maximal condition on subnormal non-normal subgroups
The structure of (generalized) soluble groups for which the set of all subnormal non-normal subgroups satisfies the maximal condition is described, taking as a model the known theory of groups in which normality is a transitive relation.
Groups whose all subgroups are ascendant or self-normalizing
This paper studies groups G whose all subgroups are either ascendant or self-normalizing. We characterize the structure of such G in case they are locally finite. If G is a hyperabelian group and has the property, we show that every subgroup of G is in fact ascendant provided G is locally nilpotent or non-periodic. We also restrict our study replacing ascendant subgroups by permutable subgroups, which of course are ascendant [Stonehewer S.E., Permutable subgroups of infinite groups, Math. Z., 1972,...
Groups with all subgroups permutable or of finite rank
In this paper we investigate the structure of X-groups in which every subgroup is permutable or of finite rank. We show that every subgroup of such a group is permutable.